Process for the manufacture of soaps containing peroxids.



COMPOSITIONS,

UNITED STATES I EIAMtNE? PATENT OFFICE.

RICHARD FRIEDRICH WOLFFENSTEIN, OF BERLIN, GERMANY, ASSIGNOR TO P. BEIERS- DORF & COMPANY, OF HAMBURG, GERMANY.

PROCESS FOR THE MANUFACTURE OF SOAPS CONTAINING PEROXIDS.

To all whom it may concern:

Be it known that I, RICHARD FRIEDRICH WoLFFENsTEIN, subject of Germany, residing at Berlin, Germany, have invented new and useful Improvements in Processes for the Manufacture of Soaps Containing Peroxide, of which the following is a specification.

It has been sought to manufacture soaps containing active oxygen, as such soaps are of great value for disinfecting as well as for bleaching purposes. The hitherto known soaps of this kind are however more mechanical mixtures of common soaps with peroxidized alkaline compounds, such as sodium )e rggid, pgggapb ggate of sodiu m, )er orate 0 sodium, and therefore suffer from a t 1086 disadvantages inherent in'a mere mixture of different combinations, since the combination lacks the desired uniformity and such preparations also tend more easily to decomposition. Furthermore the soaps thus pro duced are excessively alkaline, on account of the alkali of the peroxid compound being added to that already present in the soap itself.

It has been found that it is possible to obtain non-alkaline soap preparations containing oxygenas peroxid, by bringing together the alkali salts of the per-acids, for instance the per-carbonate of sodium or perborate of sodium with the freg fatty gc i ds. It is very remarkable, and 'contrary"to what would have been expected, that the salts of the said per-acids are so stable that they can be used Patented April 13, 1909.

Serial No. 448,421.

! in this manner instead of the caustic alkalis or alkaline carbonates.

i For manufacturing the soap preparations in question, the free fatty acids commonly used for the manufacture of soap, such as palmitic acid, stearic acid, oleio agi cl or mixtures 0 same are caused to act upon the alkali combinations of peracids such as perborate of sodium, the free fatty acid being caused to act in molecular proportion for about quarter of an hour upon the peroxid salt of sodium at the temperature of the water bath until thedesired reaction has taken place. A little water may be added if desired. The termination of the reaction is easily recognized when it is found that the common organic solvents no longer extract the fatty acids, showing that the formation of the desired sodium salts has taken place.

Having now particularly described and ascertained the nature of the said invention and in what manner the same is to be performed, I declare that what I claim is:

In the method of manufacturing soaps containing active oxygen, the step which consists in causing a peroxid salt pf an alkali to act upon free fatty acid in the'presence of heat.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RICHARD FRIEDRICH WOLFFENSTEIN.

\Vitnesses ERICK LUDWIG TELTNER, FRANZ JOSEPH HERLWIG. 

